Improvement in machines for boarding, pebbling, and glossing leather



0.COOGAN.` lmprovementn Machingor 1Boarding, Pebbling and Glossing Leather.

No. 1'19,743. Patented ot; 1o, 1.871. g

PATENT @ENCE OWEN OOOGAN, OF PITTSFIELD, MASSACHUSETTS.

IMPROVEMENT IN MACHINES FUR BOARDING, PEBBIING, ANI) GLUSSING LEATHER.

Specification forming part of Letters Patent No. 119,743, dated October 10, 1871.

To all whom it may concern:

Be it known that I, OWEN OOOGAN, of Pittsfield, iny the county of Berkshire and State of Massachusetts, have invented a new and Improved Machine for Boarding, Pebbling, and Glossing Leather; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawing forming part of this specification, in which- I Figure l represents a front elevation of my improved boarding-machine. transverse section ofthe same on the line c c, Fig. l. Fig. 3 is a detail transverse section of the same, showing the application of the pebbling-roller.

Similar letters of reference indicate corresponding parts.

My invention consists in the improvement of leather-boarding machines, as hereinafter fully described and subsequently point-ed out in the claim.

The process of boarding leather is at present carried on by vibrating a convex plate, by hand or machinery, on the doubled leather, which is on a flat table. This vibrating plate operates slowly and makes the process consequently expensive. I therefore propose to use two cylinders or rollers, A and B, hung parallel to each other in a frame, C, and geared in such manner that they will revolve in the same direction. One of the rollers hangs in vertically-adjustable bearings, so that its own weight or machinery connected with it may be used to press it against the other roller. The leather D to be boarded is doubled, placed between the two rollers, and rotary motion then imparted to the latter. The two layers of leather are thereby drawn in opposite directions, as indicated by arrows in Fig. 2. Thereby the leather is constantly folded in a new place and consequently softened, and on the in ner side at the same time grained or boarded in the desired manner. The rollers A B are smooth or roughened and made of any suitable material.

For applying a design to the face of the leatherp'ebbling77 it, as it is termed--I apply to the machine a pebbling-roller, E, which, as in Fig. 3, is placed between the rollers A B, so that the leather passes around it. The surface of the roller E is roughened by indentations or provid- Fig. 2 is a vertical,

ed with suitable design, so that such design will be impressed in the face of the leather while the same is being pressed against the pebbling-roller. In order to permit the easy application of various designs I propose to make the pebbling-roller of a central pin or shaft, a, and it short tubes b b upon the same, as indicated in Fig. 1, the tubes carrying the design on their circumference and constituting thus the outside of the pebblingroller. I

For glossin g the surface of blackened leather a smooth or glossing-roller maybe used in place of the pebbling-roller. The pebbling and gloss ing-rollers should be removable vfrom the machine, so that the same may be used for boarding only. The axis of one of the boarding-rollers B has at its end a worm, d, which meshes into the teeth of aworm-wl1eel,c, and turns the same. The wheel c has a projecting pin, f, which, after a certain amount of rotation, strikes against a lever, g, connected with a clutch-lever, h, where- I by the driving-belt is carried so as to automatically reverse the motion of the rollers. Thus the leather, after having been doubled and moved one way, is subjected to the same process under reversed motion. The pin fis set into the wheel c so as to permit full action on the entire length of leather, and must, therefore, be adjusted in position according to the length of the leather to be boarded. For this purpose the wheel e has several apertures or sockets for the reception l of said pin.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The two boarding-rolls A B, supported on shafts which have each a spur-wheel on the end thereof, combined with an intermediate idler spur-wheel, whereby the said rolls are moved in the same direction and enabled to carry the ends of a folded sheet of leather in opposite directions.

2. In combination with the supporting-shaft of the bottom one of a pair of boarding-rolls, A B, which has pulleys on one end and worm on the other, the wormwheel e having the pin f, the levers g h, and the connecting-rod, all as and for the purpose specified.

OWEN COOGAN. 

